Chaco Culture National Historical Park

Courtesy of National Park Service

In New Mexico's Chaco Culture National Historical Park, in an image taken near a water tank, the yellow-green area to the northwest shows moderate light pollution from Farmington, N.M. The green-yellow area in the southwest shows minor light pollution from Gallup, N.M. The yellow-green area to the southeast shows moderate light pollution from Albuquerque, N.M.

In New Mexico's Chaco Culture National Historical Park, in an image taken near a water tank, the yellow-green area to the northwest shows moderate light pollution from Farmington, N.M. The green-yellow area in the southwest shows minor light pollution from Gallup, N.M. The yellow-green area to the southeast shows moderate light pollution from Albuquerque, N.M. (Courtesy of National Park Service)

In New Mexico's Chaco Culture National Historical Park, in an image taken near a water tank, the yellow-green area to the northwest shows moderate light pollution from Farmington, N.M. The green-yellow area in the southwest shows minor light pollution from Gallup, N.M. The yellow-green area to the southeast shows moderate light pollution from Albuquerque, N.M.